A benign neoplasm that arises from the lung. It is characterized by the presence of mesenchymal tissues admixed with entrapped respiratory epithelium. The majority of cases are peripheral and asymptomatic. A minority of cases arise endobronchially and present with signs and symptoms of bronchial obstruction. Wedge resection or bronchoplastic resection is usually curative. Recurrence is very rare. [from
NCI]